Drive apparatus having a motor, a heat sink, and a plurality of semiconductor modules
First Claim
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1. A drive apparatus comprising:
- a motor having a motor case formed in a cylindrical shape to define an outer periphery, a stator located radially inside the motor case and wound with winding wires to provide a plurality of phases corresponding to a U-phase, V-phase, and W-phase, a rotor located radially inside the stator and rotatable relative to the stator, and a shaft rotatable together with the rotor;
a heat sink arranged in an axial direction of the motor case and having a plurality of column-shaped parts spaced apart from one another; and
a plurality of semiconductor modules provided for a plurality of power supply systems, each of which switches over coil currents for the plurality of phases corresponding to a U-phase, V-phase, and W-phase supplied to the winding wires by a plurality of switching elements, and arranged on the plurality of column-shaped parts such that one power supply system corresponds to one column-shaped part,wherein a part of the plurality of semiconductor modules forming the one power supply system is arranged on the one column-shaped part corresponding to the one power supply system;
the heat sink has a first column-shaped part and a second column-shaped part, as the plurality of column-shaped parts;
the plurality of power supply systems has a first power supply system and a second power supply system in correspondence to the first column-shaped part and the second column-shaped part, respectively;
the plurality of semiconductor modules has a first part of semiconductor modules forming the first power supply system and a second part of semiconductor modules forming the second power supply system; and
all the first part of semiconductor modules and all the second part of semiconductor modules are provided on the first column-shaped part and the second column-shaped part, respectively.
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Abstract
A heat sink has two heat radiation blocks. The heat radiation block is formed in a wide column shape. The heat radiation block has connection parts at both ends. The connection parts have respective holes formed to pass through in the axial direction of a motor. One screw is inserted in one connection part and threaded into a motor case. The other screw is inserted in the other connection part and threaded into the motor case together with a cover. A power module forming an inverter circuit of each of two power supply systems is arranged on each heat radiation blocks.
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Citations
15 Claims
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1. A drive apparatus comprising:
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a motor having a motor case formed in a cylindrical shape to define an outer periphery, a stator located radially inside the motor case and wound with winding wires to provide a plurality of phases corresponding to a U-phase, V-phase, and W-phase, a rotor located radially inside the stator and rotatable relative to the stator, and a shaft rotatable together with the rotor; a heat sink arranged in an axial direction of the motor case and having a plurality of column-shaped parts spaced apart from one another; and a plurality of semiconductor modules provided for a plurality of power supply systems, each of which switches over coil currents for the plurality of phases corresponding to a U-phase, V-phase, and W-phase supplied to the winding wires by a plurality of switching elements, and arranged on the plurality of column-shaped parts such that one power supply system corresponds to one column-shaped part, wherein a part of the plurality of semiconductor modules forming the one power supply system is arranged on the one column-shaped part corresponding to the one power supply system; the heat sink has a first column-shaped part and a second column-shaped part, as the plurality of column-shaped parts; the plurality of power supply systems has a first power supply system and a second power supply system in correspondence to the first column-shaped part and the second column-shaped part, respectively; the plurality of semiconductor modules has a first part of semiconductor modules forming the first power supply system and a second part of semiconductor modules forming the second power supply system; and all the first part of semiconductor modules and all the second part of semiconductor modules are provided on the first column-shaped part and the second column-shaped part, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification
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Current AssigneeDENSO Corporation
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Original AssigneeDENSO Corporation
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InventorsYamasaki, Masashi, Furumoto, Atsushi, Kabune, Hideki
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Primary Examiner(s)Andrews, Michael
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Application NumberUS13/379,096Publication NumberTime in Patent Office1,749 DaysField of Search310/64, 310/68.R, 310/71US Class Current310/64CPC Class CodesB62D 5/0406 including housing for elect...H02K 11/33 Drive circuits, e.g. power ...H02K 2211/03 Machines characterised by c...H02K 5/225 Terminal boxes or connectio...
